简介：ThenewspreadingconchosporesotPorphyrayezoensis,P.haitanensisandP.katadaivar.hemiphyllaareinducedbyN-Methy-N'-Nitro-N-Nitrosoguanidine(NG),astrongmutagentoinducethemutantofchromatophore.Itisshowedthat(1)nomutantshavebeeninvestigatedinallcontrolgroup.(2)TheconchosporesofallthethreespeciesofPorphyraareeasytobeinducedbyNGfortheyareinthestageofbreeding,Inthelowestdose(10μg/mL)ofthisexperiment,themutantrateofP.yezoensisisupto57.9%,thatofP.haitanensis30.7%andthatofP.katadaivar.hemiphylla51.7%.(3)Themutantratecannotincreaseobviouslybyincreasingthereagentconcentrationorprolongingtheinductiontime.Withinthescopeofexperiment,theinducementeffectsofthreespeciesofPorphyraaremuchsimilar,andthemutantrateisnear50%.TheoptimuminductionconcentrationofNGis10μg/mL,andtheoptimuminductiontimeis30minutes.

简介：TheyoungthalliofPorphyrayezoensisandP.haitanensisareinducedbyN-Methy-N'-Nitro-N-Nitrosoguanidine(NG),astrongmutagentoinducethemutantofchromatophore.Itisshowedthatnomutantshavebeeninvestigatedinallcontrolgroups,whileintheinducedgroups,itiseasytofindmutantcellsormutantcellmassesinthethallus.ThepigmentationmutantsmaybetheresultofNGinducement.Themutantrateincreasesobviouslywiththemutagenconcentrationorbyprolongingtheinductiontime.Withinthescopeofexperiment,theinducementeffectsofPorphyrayezoensisareraisedfrom11.2%to28.7%,andthoseofP.haitanensisfrom10.1%to20.2%.Accordingtoourexperiments,theamountofmutantcellsinthesameareadoesnotincreasewiththeinductionintensityTheamountofmutantcellsineverygroupofinducementofbothspeciesofPorphyrachangesverylittlewiththefixedfieldscheckmethod.Thelowestdose(25μg/mL)ofthisexperimenthasahighmutantrate.Themutantrateshowsthepercentageofmutantcellsinallthesurvivedcells,whiletheamountofmutantcellsreflectstheeffectofinducement.ThustheoptimuminductionconcentrationofNGis25μg/mL,andtheoptimuminductiontimeis30minutes.

简介：高精度的海洋磁力测量对磁测仪器系统的测量精度提出了更高的要求，文中对海洋磁力测量仪器系统检验的内容和动静态检验方法进行了研究，并通过实例验证其可行性。结论表明：所提出的仪器系统检验方法可以消除仪器系统误差的影响，提高海洋磁力测量精度，保证成果的可靠性。

简介：主要介绍了卫星高度计在海洋学研究中的意义、高度计的定标原理、定标方法和国际主要的高度计定标试验场。结合卫星高度计定标的特点，着重介绍了GPS浮标在高度计定标中的优势、技术难点以及解决方法等，旨在为海洋二号卫星的高度计定标技术提供依据。